Tokyo, Taisho era (1912-1926).
Aria Kaibara, who wishes to become a pianist, takes the exams to become a preparatory student at the Tokyo Music School.
The passion in her playing overwhelms her surroundings, like a ripple on the surface of water.
It is then that Aria has an encounter with the son of the Nishimikado noble family, Natsuo, and learns a shocking truth…
The youth of a maiden blessed by the god of music in this stream of musical romance!